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7028808085 = 513108135509
BaseRepresentation
bin1101000101111001…
…10001100110010101
3200010211221110001101
412202330301212111
5103343333324320
63121243430101
7336115611565
oct64274614625
920124843041
107028808085
112a87640602
121441b25331
13880281550
144a96d8da5
152b2109c0a
hex1a2f31995

7028808085 has 8 divisors (see below), whose sum is σ = 9083382840. Its totient is φ = 5190504384.

The previous prime is 7028808071. The next prime is 7028808107. The reversal of 7028808085 is 5808088207.

It can be written as a sum of positive squares in 4 ways, for example, as 825355441 + 6203452644 = 28729^2 + 78762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7028808085 - 219 = 7028283797 is a prime.

It is a super-2 number, since 2×70288080852 = 98808286191522734450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54067690 + ... + 54067819.

It is an arithmetic number, because the mean of its divisors is an integer number (1135422855).

Almost surely, 27028808085 is an apocalyptic number.

It is an amenable number.

7028808085 is a deficient number, since it is larger than the sum of its proper divisors (2054574755).

7028808085 is a wasteful number, since it uses less digits than its factorization.

7028808085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108135527.

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 7028808085 is about 83837.9871239762. The cubic root of 7028808085 is about 1915.5517760457.

The spelling of 7028808085 in words is "seven billion, twenty-eight million, eight hundred eight thousand, eighty-five".

Divisors: 1 5 13 65 108135509 540677545 1405761617 7028808085